Electrical circuit closer



Oct. 23, 1928, 1,688,697

- F. FISCHER EIAL ELECTRICAL CIRCUIT CLOSER Filed June 21. 1926 Fig.11

' INVENTORS PM; oct 23, 1928;

UNITED STA res PATENT: orr cr...

FRANK rrscrmn, or mnonmoNr, NEw YORK, AND AR OLD 1. mm raw, or INTER- LAKEN, NEW JERSEY, AssIqNons 'ro GRANT OIL BURNER, CORPORATION, or WIL- uINoroN, DELAWARE, ACORPORA'IION or- DELAWARE.

ELECTRICAL CIRCUIT CLOSER.-

Application filed June 21, 1926. Serial No. 117,393.

Our invention relates to a circuit-closer actuated by an electric spark, wherein two or more circuits, normally open through a come mon air-gap, are closed when a spark jumps the gap and thereby breaks'down the gaprefsistance to all of the circuits otherwise open at that point. 1 I

One of the objects of our invention is to prevent the energizing of a given circuit unless a spark is obtained across the air-gap. This is particularly desirable in an oil-burner safety control-circuit in which the burner is prevented from operating unless the requ red ignition spark is obtained.

Another object is to dispense withmechani- V cal moving parts in hot locations.

Another ob'ect is to obtain automatic and remote electrical control without the use of 7 moving parts.

1 scription taken in connection air-gap 6.

Still other objects will hereinafter appear. The nature and scope of this invention are more fully explained in the following dewith the accompanying drawings forming part of this speci- -iication,.in which:

Figure I is a diagram of our circuit-closer conductive to the motor circult. Th1s stops as applied to, an oil burner control circuit.

Figure ,II is a diagram of our circuit-closer adapted to an oil burner control circuit similar to Figure I, but having a' low voltage relay-circuit, instead of the main motor-circuit, energized across the air-gap.

Similar numeralsrefer to similar parts in both figures. l I In Figure I, 1 and 2*arealternating current power leads, 3 is a motor, ll-and 5 are electrodes separated'by air-gap 6. 7 and 8 are switch 10 is closed.

The transformer secondarypoil '11 is connected by means of wires 12 and '13 to electrodes 14 and 15 which-are al'so separated by *The' .air andoil motor 3 isbridgedacross leads 1 and 2when relay armature 20 contacts with contact point same as. I

- 21-otherwise the circuit of Figure II is the -pended claims F 1 The operation of our circuit-closer is as follows:

The power current is always resumed to be on lines 1 and 2 (see Figure I When the control switch 10 is closed, the

primary transformencoil 9 is energized. Th1s energizes the high-tension secondary coil 11 and causes a spark to jump across airgap 6 between electrodes Hand 15.

The above spark, in breaking down the resistance of air-gap 6, permits the relatively.

low voltage current to pass between electrodes 4 and 5, thereby .energizing motor 3.

The pump 16 which is driven by motor 3,

discharges a combustible mixture through nozzle 18 in proximity to air gap 6, so that the mixture is ignited when a spark jumps across the air-gap.

- The maintenance of the spark is necessary 7 to the continuous operation of the burner, and

the burner obviously will not run if the spark circuit should be open, short-circuited, or otherwise rendered inefli'ective.

The opening of control-switch 1-0 de-energizes the transformer coils 9 and 11, stopping the spark and thereby rendering gap 6 nonpump 16 and the burner remains inactive until switch 10 is again closed and the cycle rewhich in turn closes the motor-circuit through the contact of armature 20'with contactor 21.

Failure of the spark opens the relay circuit and thereby prevents operation of the motor.

Explosions with oil burners often occur through the belated ignition of accumulated oil or combustible mixtures in the fire-box.

'With our device no oil can enter the fire-box without passing the spark which ignites it as it enters; and consequently there can-be no I v accumulation of combustibles to explode.- pump 16 is driven by motor 3' and, discharges a combustible mixture of.

Various modifications and changes may be made without departing from the spirit and scope of our invention, and we do-not confine 1 4 our invention to its use with. oil burners but In Fig; II, relay coil 19 1s connected inseries between lead 2 and electrode 4; and

desire that only s uch 'limitations shall be placed thereon as are imposed by the 'prior We claim 1. An electrical circuit-closer, consisting of a high-voltage controllin circuit having a spark gap and a relatively ow voltage controlled circuit having an air-gap interceptin the spark-gap, the air-gap being rendered 'relativelj conductive in the controlled circuit when ener -zed b a s ark produced at the gl 3 E spark gap by the big -voltagecontrolling circuit, and a switch in the controlling circuit.

2. In an electrical circuit-closer, a highvoltage controlling-circuit having a pair of gized by the high-voltage controlling .cir-- cuit.

3. In an oil burner control circuit, a fuelsupply motor, a burner nozzle, a high voltage circuit having a spark gap adjacent to the nozzle for igniting the burner, a motor con trolling circuit having, a pair of electrodes separated by the spark gap, the electrodes being insulated from each other by the gap when the s ark is absent but in electrical communication when the spark is present.

4. In a burner ignition device, a high-voltage circuit havin a spark gap for producing an ignition spark, a controlled circuit, and means responsive to the presence of an ignition spark for energizing the controlled circuit when an ignition spark is produced and substantially deenergizing the controlled circuit when said. ignition spark is absent.

FRANK FISCHER. ARNOLD F. VAN PELT. 

